Compound Interest Calculator
See how your money grows over time with compound interest.
What is compound interest?
Compound interest is interest calculated on the initial principal and also on the accumulated interest from previous periods. Unlike simple interest, which is calculated only on the principal, compound interest allows your investment to grow exponentially over time.
How is compound interest calculated?
The formula is A = P(1 + r/n)^(nt), where P is the principal, r is the annual interest rate, n is the number of compounding periods per year, and t is the number of years. When regular contributions are included, each contribution compounds separately from the date it's added.